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The assassination of Archduke Franz Ferdinand was the immediate trigger for World War I, setting off a diplomatic crisis that rapidly escalated into a full-scale conflict. -
American neutrality during the early years of World War I allowed the United States to experience significant economic growth while solidifying its position as a major world power. -
The importance of the Battle of the Marne lies in its role as a crucial turning point in World War I, where the Allied forces halted the German advance into France and prevented the fall of Paris. -
The sinking of the Lusitania was important because the attack killed 128 Americans and outraged the public, helping to shift American opinion from neutrality towards intervention in World War I. -
The Battle of Verdun was important for its role as a symbol of French resistance and a turning point that exhausted the German army during World War I. -
The importance of the Sussex Incident lies in the diplomatic crisis it caused between Germany and the United States, leading Germany to issue the Sussex Pledge to avoid war. -
The importance of the Battle of the Somme lies in its role as a symbol of the futility and brutality of trench warfare, its devastating impact on both sides, and its contribution to the development of new military tactics like the use of tanks. -
The Zimmermann Telegram was important because it served as a major catalyst for the United States to enter World War I in April 1917. -
It pushed the United States to enter World War I and fundamentally changed naval warfare. -
It provided a decisive shift in favor of the Allies through fresh troops, vast resources, and crucial financial support, ultimately helping to turn the tide of the war and secure an Allied victory. -
It established a legal mechanism for the government to conscript citizens into military service. -
Protecting national security by criminalizing the mishandling of sensitive information and suppressing dissent. -
Their arrival provided crucial manpower and resources to the Allied forces, turning the tide of the war and contributing to key victories in the final offensives of World War I. -
The Fourteen Points by President Woodrow Wilson were important for articulating a new vision for international relations based on open diplomacy, self-determination, and cooperation, rather than punitive peace and territorial conquest. -
It's catastrophic global death toll, its impact on World War I, and its influence on public health and medicine, which led to a greater emphasis on public health infrastructure and interventions like quarantine and social distancing. -
Crucial because it allowed Germany to focus its military on the Western Front, significantly shifting the war's balance and making an Allied victory seem less likely. -
A major test of freedom of speech and the press, and its role in fueling a major political controversy that tested the limits of the First Amendment. -
It was the final Allied offensive that contributed to ending World War I, demonstrating the resolve of the U.S. military, and solidifying America's position as a major global power. -
It marks the end of fighting on the Western Front during World War I and is commemorated to honor those who served in the war. -
Formally ending World War I, redrawing the map of Europe, and creating the League of Nations.